Frank Montecalvo won the 2015 Pirelli World Challenge GTA championship at Laguna Seca, whilst team-mate Eric Lux took the race victory. Meanwhile, Colin Thompson was once again victorious in GT Cup, taking the title with a massive points lead.

Ernie Francis Jr. won the final Pirelli World Challenge Touring Car round of the season at Laguna Seca, but Corey Fergus took the championship. Jason Wolfe and Johan Schwartz won the TCA and TCB titles.